dc optimisers vs MICROINVERTERS
Tru Blu Solar Co create professional solar quotes for residents of the Central Coast, Newcastle and Sydney on a daily basis. A recent conversation that one of our sales representatives has had with a client was about what is better; DC optimisers or micro inverters. In this article we will analyse the return on investment for a 10kW Solar System with each technology. We will keep all other components exactly the same to enable a fair comparison. Adding to this, the prices quoted are only guides and make sense for the date that this article has been written. Also, the percentage profit for each stated system is equal to enable fair comparison.
Tru Blu Solar Co typically will install SolarEdge Optimisers or Epnhase Micro Inverters on the roofs that we work on throughout the Central Coast, Newcastle and Sydney. Our opinion on what is better goes to SolarEdge Optimisers and the reasons why are explained below.
10kW solar system with enphase microinverters
On a single story tin roofed home with enough space on two roof faces to support 34 REC 295W Solar Panels it would cost around $15,000 to install with the micro inverters.
Ideally, the yearly production will be: 14,600 kWh/year which will enable a minimum return (with the current 20c/kWh FIT) of $2,920/year. Enabling a return of investment that is about 5.1 years. Considering that the product warranties associated with this installation are valid for 10 years it isn’t a bad investment but there is definitely room for improvement. In a sense you are only going to get just under 2x the amount of your investment within the warranted period. The micro inverters are still a state of the art product but purely on price point we don’t think they are competitive enough with an optimised solar system. There are several other considerations to be made when installing a solar system however, and Finn Peacock from Solar Quotes explains the differences between each of these products further in this article.
10kW Solar System with solaredge optimisers
On a single story tin roofed home with enough space on two roof faces to support 34 REC 295W Solar Panels it would cost around $13,200 to install with the optimisers.
Ideally, the yearly production will be: 14,600 kWh/year which will enable a minimum return (with the current 20c/kWh FIT) of $2,920/year. Exactly the same as the micro inverter system. However, with a better return of investment = 4.5 years. In addition to this, the optimisers and the inverter it is connected to are warranted for 25 years at this price. Which means, you can get 5.5x the amount of your investment within the warranted period. That is a lot better than the optimised system.